Picker-stick motion for looms



Patented June 29, 1926.

unirse sraras 1,590,425 anfratti ferries.

HARRY A. DAVIS, OF HOPEDALE, MASSACHUSETTS, ASSEGNOR rif() DRA'ER COR'iUHf T1011, 0F HOPEDALE, MASSACHUSETTS, A CORPORATIGN OF MAINE.

PICKER-STICK MOTION FOR LOOMS.

Application led November 17, 192B. Serialv Nro. 675,299.

This invention relates to the picker stick motion of a loom and particularly to the bearingfor the lower end of the picker stick against the pull of the lug strap or the mechanism by which the pickerl stick is moved or thrown to perform its function.

The pickerY stick is usually attached to a segmental shoe which rocks upon a flat stand. The lower end of the picker stick projects through this stand and has a bearing on its inner side to hold the lower end f the picker .stick against movement inwardly during the pull of the lug strap and the consequent picking motion ofthe picker stick. This bearing is subject to veryitrying conditions and if worn or broken interi feres with the accurate operation of the loom or prevents the operation of the loom.

The object of the present invention is to provide a simple and efficient bearing construction at this point which will be subjected to a minimum amount of wear, in which the wear will be evenly distributed, and in which great durability wili be ini' sured while at the same time removal and replacement when necessary can be readily effected.

More particularly the object of the invention is to provide at the bearing point in question a bearing roll, preferably of hardened steel and preferably journalled on a stud so mounted thatupon each complete oscillation of the picker stick it is given. a rotary shift thus evenly distributing the wear which may take place and insuring the maintenance of the cylindrical form of the roll.

These and other objects and features of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims. Y

In the drawings:

1 is a front elevation partially broken away of the lower left hand portion of a loom embodying a preferred form of the present invention.

Fig. 2 is a plan View partially in horizontal cross section showing on an enlarged l scale the main portion of the stand shown in Fig. 1.

` Fig. 3 is a view in vertical cross section taken on the line 3dB in Fig. 2 with the stud and pin shown in elevation.

Figis an end View of the roll and stud .shown in Fig. 3. a

As the picker stick motion and its pur poses and functions in the operation of a loom are well known and familiar to those skilled in the art it is necessary only toillustrate and describe the same so far as is necessary to a disclosure of the present invention.

In the constructionillustrated `the side 1 of the loom frame is shown assupporting the usual .stand for the picker stick shoe. This stand Qproj ects laterally from the loom side 1 and is provided witha flat upper surf stick projects down at 9 below the shoe and there is usually provided on the inner face of the picker stick a metal protecting or down hold member 10 known as the tongue. The shoe 7, picker stick, and down hold member are rigidly bolted together at 11. 1

The shoe rocks on the flat surface 3 of the stand and is further guided by the lug 5 entering a slot therein.

The usual spring device 12 is shown mounted on a lug 13 projecting downwardly from the stand and connected by the strap 14; to the picker stick at 15.

The picker stick is shown as given its picking motion through the pull of a lug strap 16 and it will be seen that when the picker .stick is thus moved the lower end 9 protected by the member 10 will bear against the inner end of the slot 4. It is at this point that the bearing construction is required.

In. the preferred form of the bearing construction illustrated. a metal pin 17 is mounted transversely in the walls of the stand near the inner end of the slot 4. Upon this pin is mounted a cylindrical stud 18. This stud at one end is provided with an angular o set 19 fitting a corresponding recess 20 in the stand thus to prevent rotation of the stud with respect to the stand. On its upper surface the stud is provided with a lubricant reservoir 2l herein shown as an open groove in which oilA or grease may be placed. A cylindrical hardened (steel roll 22 is mounted on the stud between the Walls of the slot 4 and is free to revolve on the stud.

The lower end of the picker stick or its protecting' member 10 rests against the surface of the roll 22 Which thus acts as a bearing for the picker stick when the lug' strap or other device moves the picker stick to give it its picking motion. Owing to the picking motion of the picker stick and the sudden blow by which the' picking motion isjimpart'edto it there is not a constant engagement between the lower vendy of the picker stick and the bearing roll 22. Con seduentlv at each complete oscillation of the picker stick this bearing roll is givenl a. rotary shift on the stud 18. Consequently the portion of the surface of the bearing roll irl-"engagement with the picker stick is lconstantly shifting` roftarily. Thus such Wear as occurs is evenly distributed and the cyvlindric'al shape of the bearingr roll maintained. Furthermore the lubrication is evenly and regularly distributeolbetween the bearing roll and the stud. i

There is thus presented a very simple and eicient bearing construction which will withstand the hardusage to Which it is subjected.

When it is desired to remove for repair or otherwise and to replace the bearing construction it is vonly necessary to knock out the pin 17 When the stud and roll may readily be removed and replaced.

Having thus described the invention, what is claimedias new, and desired to be secured by Letters Patent, is:

In a loom a picker stick and its attached shoe, a stand on Which the shoe rocks having' a longitudinal slot to receive the lower end of' the picker stick, a cylindr-ical'stud mounted transversely of the stand in the inner' end of' the slot and provided with a projection engaging the stand and preventing rotation of the'stud, and a cylindrical bearing roll journalled on the stud, the picker stick acting upon each complete oscillation to give a rotary shift -to the bearing roll whereby Wear is evenly distributed and the surface of the roll maintained cylindrical.

In testimony whereof, I have signedv my name to this specication.

HARRY A. Davis. 

